Re: [PATCH v4 0/3] ARM: shmobile: r8a7779/90: Poll MSTP clocks status

[Simon Horman <horms@verge.net.au>]

On Tue, Jan 07, 2014 at 05:53:38PM +0900, Simon Horman wrote:
> On Tue, Jan 07, 2014 at 09:34:12AM +0100, Laurent Pinchart wrote:
> > Hi Simon,
> > 
> > On Saturday 14 December 2013 16:23:50 Laurent Pinchart wrote:
> > > Hello,
> > > 
> > > This patch set implements a busy loop to ensure that enabling an MSTP clock
> > > will not return before the clock is actually enabled. It has successfully
> > > been tested on the Marzen board and on the Lager board where they fix
> > > random crashes with the VSP1.
> > > 
> > > Simon, could you please apply this for v3.14 ?
> > 
> > Ping ?
> > 
> > This patch series is required to fix crashes with the VSP1 on R8A7790.
> 
> Thanks. I haven't heard back from Paul so I'll look at queuing
> this up tomorrow.

Hi Laurent,

I have queued up this series locally in the soc-fixes-for-v3.14 which
I plan to include in the devel and next branches and push later today.

It would help me when sending a pull-request for these changes if
you could give me a description of the problem they solve and if
possible when they problem was introduced.

e.g. (I am completely guessing about the cause)

This resolves crashing when using VSP1 which has been observed on the
r8a7779 (R-Car H1) based Marzen board. This problem has been present since
VSP support was added to Marzen by deadbeef ("ARM: shmobile: marzen: Add
VSP1") in v3.W-rcX.

This also resolves the same problem on the r8a7790 (R-Car H2) based Lager
board. The problem was introduced there by by dead1234 ("ARM: shmobile:
lager: Add VSP1") in v3.Y-rcZ.